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srcu: Make Classic and Tree SRCU announce themselves at bootup

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Currently, the only way to tell whether a given kernel is running
Classic, Tiny, or Tree SRCU is to look at the .config file, which
can easily be lost or associated with the wrong kernel.  This commit
therefore has Classic and Tree SRCU identify themselves at boot time.

Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
This commit is contained in:
Paul E. McKenney 2017-04-21 11:16:32 -07:00
parent 59ca3f9fef
commit 1f4f6da1c8
2 changed files with 14 additions and 0 deletions
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7
kernel/rcu/srcu.c
View file

@ -659,3 +659,10 @@ void process_srcu(struct work_struct *work)
srcu_reschedule(sp);
}
EXPORT_SYMBOL_GPL(process_srcu);
static int __init srcu_bootup_announce(void)
{
pr_info("Classic SRCU implementation.\n");
return 0;
}
early_initcall(srcu_bootup_announce);

7
kernel/rcu/srcutree.c
View file

@ -1167,3 +1167,10 @@ void srcutorture_get_gp_data(enum rcutorture_type test_type,
*gpnum = rcu_seq_ctr(sp->srcu_gp_seq_needed);
}
EXPORT_SYMBOL_GPL(srcutorture_get_gp_data);
static int __init srcu_bootup_announce(void)
{
pr_info("Hierarchical SRCU implementation.\n");
return 0;
}
early_initcall(srcu_bootup_announce);